Home / 13,347.84-18,420.21-7,379.46

Finding the Fourth Proportional to 13,347.84, 18,420.21 and 7,379.46

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Solution

The fourth proportional to 13,347.84, 18,420.21 and 7,379.46 is: 10,183.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,347.84 : 18,420.21 = 7,379.46 : x
  2. Step 2: Convert to fraction form
    13,347.84/18,420.21 = 7,379.46/x
  3. Step 3: Cross multiply
    13,347.84x = 18,420.21 × 7,379.46
  4. Step 4: Simplify right side
    13,347.84x = 135,931,202.89
  5. Step 5: Solve for x
    x = 135,931,202.89/13,347.84
  6. Step 6: Final answer
    x = 10,183.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.